CN220474157U - Automobile passage management device - Google Patents
Automobile passage management device Download PDFInfo
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- CN220474157U CN220474157U CN202322131236.6U CN202322131236U CN220474157U CN 220474157 U CN220474157 U CN 220474157U CN 202322131236 U CN202322131236 U CN 202322131236U CN 220474157 U CN220474157 U CN 220474157U
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Abstract
The utility model belongs to the technical field of vehicle traffic management, and discloses an automobile passage management device, which comprises: a core board including a main chip; the ground sensing detection circuit is used for detecting the entering of a vehicle; the camera module is connected with the ground sensing detection circuit and is used for recognizing license plates when vehicles enter; the RTC module is used for providing a time reference; the barrier gate control circuit is used for controlling the opening and the falling of the barrier gate; the LED light filling lamp control circuit is used for adjusting the brightness of the LED light filling lamp; the intercom input module is used for acquiring an audio signal after the key is triggered; the audio output circuit is used for amplifying the output power of the audio; the core board is connected with the display screen through the RS485 communication circuit and is connected with the upper computer through the network interface circuit. The automobile channel management device provided by the utility model can accurately and automatically recognize the numbers, letters and Chinese characters of the license plate in real time by using the CV500 core module, and directly give out the recognition result.
Description
Technical Field
The utility model belongs to the technical field of vehicle traffic management, and particularly relates to an automobile passage management device.
Background
In modern life, as vehicles are increasingly used, vehicle traffic checkpoints, such as parking lot entrances and exits, are arranged in many places to detect vehicle traffic. The ground induction coil is buried in a certain position of the vehicle channel, when a vehicle passes through, an induction signal is generated on the ground induction coil, and the induction signal is processed and converted by the signal detector and then is transmitted to a corresponding control device, so that whether the vehicle passes through or not can be known. In addition, the camera device is arranged at the entrance and exit of the parking lot, and the control device can shoot the vehicle when detecting that the vehicle passes through, but due to the influence of conditions such as external environment light change, dust in an optical path, seasonal environment change, pollution and blurring of the license plate, the license plate recognition rate of the camera device is not high, so that the license plate reading failure is caused, and the automatic parking control is not facilitated.
Disclosure of Invention
The present utility model aims to solve the above technical problems at least to some extent. To this end, the present utility model aims to provide an automotive lane management apparatus.
The technical scheme adopted by the utility model is as follows:
an automotive lane management apparatus comprising:
a core board including a main chip;
a ground sensing detection circuit for detecting an entry of a vehicle;
the camera module is connected with the ground sensing detection circuit and is used for recognizing license plates when vehicles enter;
an RTC module for providing a time reference;
the barrier gate control circuit is used for controlling the opening and falling of the barrier gate;
the LED light filling lamp control circuit is used for adjusting the brightness of the LED light filling lamp;
the intercom input module is used for acquiring an audio signal after the key is triggered;
an audio output circuit for amplifying an output power of the audio;
the core board is respectively connected with the power supply module, the ground sensing detection circuit, the camera module, the RTC module, the barrier gate control circuit, the LED light supplementing lamp control circuit, the intercom input module and the audio output circuit; the core board is connected with the display screen through the RS485 communication circuit and is connected with the upper computer through the network interface circuit.
Preferably, the power module comprises a protection circuit and a DC-DC circuit connected with the protection circuit, the protection circuit comprises a Schottky diode D12 and a self-recovery fuse F1 which are connected in series, the self-recovery fuse F1 is connected with the DC-DC circuit, and a TVS diode D12 is arranged on a line between the self-recovery fuse F1 and the DC-DC circuit.
Preferably, the RTC module includes an RTC circuit and an RTC power supply switching circuit, the RTC circuit includes a real-time clock chip U14, and the RTC power supply switching circuit is configured to switch the external power supply to supply power to the real-time clock chip U14 when the external power supply is turned on; when the external power supply is disconnected, the built-in battery is switched to supply power for the real-time clock chip U14.
Preferably, the intercom input module comprises a key trigger circuit, an LED display circuit and an audio signal input circuit, wherein the audio signal input circuit is used for amplifying an audio signal and then transmitting the amplified audio signal to the core board.
The beneficial effects of the utility model are as follows:
the automobile channel management device provided by the utility model can accurately and automatically recognize the numbers, letters and Chinese characters of the license plate in real time by using the CV500 core module, and directly give out the recognition result. Meanwhile, the vehicle characteristics, such as colors and the like, can be identified through the captured pictures, and the vehicle can be used in outdoor severe environments, and is stable and reliable. The system can be applied to a red light running electronic police system, a high-definition security gate system, a radar overspeed snapshot system, a road video monitoring system, a high-definition license plate recognition system, a road vehicle speed measurement system, a parking lot license plate recognition management system and a community entrance snapshot system.
Drawings
Fig. 1 is a schematic block diagram of an automotive lane management apparatus of the present utility model.
Fig. 2 is a schematic diagram of the protection circuit of the present utility model.
Fig. 3 is a schematic diagram of a DC-DC circuit of the present utility model.
FIG. 4 is a schematic diagram of the RTC circuit of the present utility model.
FIG. 5 is a schematic diagram of an RTC power switching circuit of the present utility model.
Fig. 6 is a schematic diagram of the LED light supplement lamp control circuit of the present utility model.
FIG. 7 is a schematic diagram of a local sense detection circuit of the present utility model.
FIG. 8 is a schematic diagram of a key trigger circuit according to the present utility model.
Fig. 9 is a schematic diagram of an LED display circuit of the present utility model.
Fig. 10 is a schematic diagram of an audio signal input circuit of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should also be appreciated that in the embodiments, the functions/acts may occur in a different order than the figures. For example, two figures shown in succession may in fact be executed substantially concurrently or the figures may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
As shown in fig. 1 to 10, the automobile channel management device of the present embodiment includes a core board and a camera module, the core board including a main chip; the core board and the camera module adopt CV500 core modules of Tianshitong corporation. The module adopts a dual-core 32-bit DSP (Haishi 3516CRBCV 500), the sensor is an IMX307 of SONY, 200 ten thousand pixels 1/2.8' CMOS, H.265+/H.265/H.264 video coding is supported, and dual-code stream and AVI format are supported; the supporting code stream is adjustable from 200k to 8000k bps, the supporting low code stream, and the supporting P system and N system.
The core board is also respectively connected with the power supply module, the ground sensing detection circuit, the RTC module, the barrier gate control circuit, the LED light supplementing lamp control circuit, the intercom input module, the audio output circuit, the card reader interface and the USB communication circuit; the core board is connected with the display screen through the RS485 communication circuit and is connected with the upper computer through the network interface circuit.
As shown in fig. 7, the ground sensing detection circuit includes a ground sensing coil buried under a lane, and when a vehicle passes, a signal is triggered to detect the entrance of the vehicle. The camera module is connected with the ground sensing detection circuit and is used for recognizing license plates when vehicles enter; the barrier gate control circuit adopts two independent relays for controlling the opening and the falling of the barrier gate.
The RTC module is used for providing a time reference, as shown in fig. 4 and 5, and the RTC module includes an RTC circuit and an RTC power supply switching circuit, the RTC circuit includes a real-time clock chip U14, the real-time clock chip U14 adopts a domestic BM8563, and is a CMOS real-time clock/calendar external chip with low power consumption, which supports programmable clock output, interrupt output, low-voltage detection, and the like. The RTC power supply switching circuit is used for switching the external power supply to supply power for the real-time clock chip U14 when the external power supply is switched on; when the external power supply is disconnected, the built-in battery is switched to supply power for the real-time clock chip U14. Thereby greatly prolonging the service life of the battery, reducing the inconvenience brought by replacing the battery and simultaneously reducing the cost.
The LED light filling lamp control circuit is used for adjusting the brightness of the LED light filling lamp; as shown in fig. 6, the CV500 core module outputs PWM signals to adjust the brightness of the LED light supplement lamp, and the dimming chip uses T6322A. T6322A is a buck LED constant current drive IC, the input voltage is 7 to 30V, the maximum output current is 1.5A, and the PWM dimming function is supported.
As shown in fig. 2 and 3, the power module includes a protection circuit and a DC-DC circuit connected to the protection circuit, after the power is input, the protection circuit includes a schottky diode D12 and a self-recovery fuse F1 connected in series, the self-recovery fuse F1 is connected to the DC-DC circuit, and a TVS diode D12 is disposed on a line between the self-recovery fuse F1 and the DC-DC circuit. The DC-DC circuit is used for converting 12V voltage into 5.0V voltage, and the selected chip of the circuit is MP2303A.
The schottky diode D12 is unidirectional and can prevent reverse connection of power. When normal working current flows through the self-recovery fuse F1, the self-recovery fuse F1 is in a low-resistance state; when abnormal overcurrent passes through the circuit, the circuit is in a high-resistance state; when the overcurrent in the circuit disappears, the conductive path is reconfigured again, and the circuit is restored to a normal state without manual replacement, so that the circuit overcurrent protection is realized. When the TVS diode D12 is subjected to reverse transient high-energy impact, the high resistance between the two poles is immediately reduced to low resistance at the speed of 10-12 seconds in a short time, the surge power of thousands of watts is absorbed, the voltage clamping element between the two poles is at a preset voltage value, and the precise components in the electronic circuit are effectively protected.
The intercom input module is used for acquiring an audio signal after the key is triggered; as shown in fig. 8, 9 and 10, the intercom input module includes a key trigger circuit, an LED display circuit and an audio signal input circuit, and the audio signal input circuit is used for amplifying an audio signal and then transmitting the amplified audio signal to the core board. The key trigger circuit is used for informing the CV500 core module and starting the intercom function. To protect the main chip, optocoupler isolation is added. The LED display circuit surrounds the keys and is used for prompting functions. The audio signal input circuit is used for amplifying the audio signal and then transmitting the amplified audio signal to the core board. Because the input signal is weak, the input signal needs to be amplified in advance to be identified by the main chip.
Since the audio output power of the CV500 core module is small, an audio output circuit must be used to amplify the audio output power; the audio output circuit adopts the domestic power amplifier NS4110B, can provide output power of up to 10W for a 4 omega load when the working voltage is 9V, and has built-in overcurrent protection, overheat protection and undervoltage protection functions, so that the chip is effectively protected from being damaged under abnormal working conditions.
The card reader interface adopts Wiegand protocol, which is a communication protocol formulated by Motorola, and is suitable for a plurality of characteristics of card readers and cards of access control systems, the protocol does not define the baud rate of communication or the Wiegand format of data length, and the protocol is mainly defined as a data transmission mode: the Data lines Data0 and Data1 respectively transmit 0 and 1, and the most commonly used Data are 26Bit,34Bit,36Bit,44Bit and the like, wherein the standard 26-Bit format is an open format, and almost all access control systems now accept the standard of the 26-Bit format.
The Wiegand interface consists of 3 wires, which are: data0 (Data 0), data1 (Data 1) and signal Ground (GND). These 3 lines are responsible for transmitting the Wiegand signal. D0 D1 remains at +5v high level when no data is output. If the output is 0, D0 continuously outputs a low level, and if the output is 1, D1 continuously outputs a high level. The minimum separation between the two electronic kawasabi outputs is 0.25 seconds.
Because the output signal level of the external wiegand card reader is 5V, an optical coupling circuit is adopted for isolation buffering in order to protect a main chip.
Because the USB interface supports hot plug, static electricity is easy to generate to damage devices, and a special ESD diode USBLC6 is used in the USB communication circuit, the reliability of the circuit is improved.
The utility model is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present utility model, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present utility model, fall within the scope of protection of the present utility model.
Claims (5)
1. An automobile passage management apparatus, characterized by comprising:
a core board including a main chip;
a ground sensing detection circuit for detecting an entry of a vehicle;
the camera module is connected with the ground sensing detection circuit and is used for recognizing license plates when vehicles enter;
an RTC module for providing a time reference;
the barrier gate control circuit is used for controlling the opening and falling of the barrier gate;
the LED light filling lamp control circuit is used for adjusting the brightness of the LED light filling lamp;
the intercom input module is used for acquiring an audio signal after the key is triggered;
an audio output circuit for amplifying an output power of the audio;
the core board is respectively connected with the power supply module, the ground sensing detection circuit, the camera module, the RTC module, the barrier gate control circuit, the LED light supplementing lamp control circuit, the intercom input module and the audio output circuit; the core board is connected with the display screen through the RS485 communication circuit and is connected with the upper computer through the network interface circuit.
2. The automobile tunnel management apparatus according to claim 1, wherein: the power module comprises a protection circuit and a DC-DC circuit connected with the protection circuit, wherein the protection circuit comprises a Schottky diode D12 and a self-recovery fuse F1 which are connected in series, the self-recovery fuse F1 is connected with the DC-DC circuit, and a TVS diode D12 is arranged on a circuit between the self-recovery fuse F1 and the DC-DC circuit.
3. The automobile tunnel management apparatus according to claim 1, wherein: the RTC module comprises an RTC circuit and an RTC power supply switching circuit, the RTC circuit comprises a real-time clock chip U14, and the RTC power supply switching circuit is used for switching an external power supply to supply power for the real-time clock chip U14 when the external power supply is switched on; when the external power supply is disconnected, the built-in battery is switched to supply power for the real-time clock chip U14.
4. The automobile tunnel management apparatus according to claim 1, wherein: the intercom input module comprises a key trigger circuit, an LED display circuit and an audio signal input circuit, wherein the audio signal input circuit is used for amplifying an audio signal and then transmitting the amplified audio signal to the core board.
5. The automobile tunnel management apparatus according to any one of claims 1 to 4, wherein: the core board is also connected with a card reader interface and a USB communication circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322131236.6U CN220474157U (en) | 2023-08-08 | 2023-08-08 | Automobile passage management device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322131236.6U CN220474157U (en) | 2023-08-08 | 2023-08-08 | Automobile passage management device |
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| Publication Number | Publication Date |
|---|---|
| CN220474157U true CN220474157U (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322131236.6U Active CN220474157U (en) | 2023-08-08 | 2023-08-08 | Automobile passage management device |
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| Country | Link |
|---|---|
| CN (1) | CN220474157U (en) |
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2023
- 2023-08-08 CN CN202322131236.6U patent/CN220474157U/en active Active
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